Prep Time
15 Mins
Chill Time
8 Hours
Grill Time
7 Mins
Makes 4 servings

How to Make It

Step 1

Arrange onion slices in a single layer in a 13- x 9-inch baking dish.

Step 2

Stir together vinegar and next 4 ingredients. Pour over onion slices. Cover and chill 8 hours, turning once.

Step 3

Remove onions from dressing with a slotted spatula, reserving dressing.

Step 4

Grill onion slices, covered with grill lid, over medium-high heat (350° to 400°) 2 minutes on each side or until crisp-tender and golden.

Step 5

Layer half of grilled onion slices each with 1 cheese round, 2 basil leaves, and 1 tomato slice; top with remaining half of onion slices.

Step 6

Grill onion stacks, covered with grill lid, over medium-high heat 3 minutes or until cheese melts. Serve onion stacks with reserved dressing. Garnish, if desired.

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